Maybe you could elaborate on why you dislike the word? Whats wrong with immersing yourself in a game?

Because immersion is almost completely subjective. Sure I guess you could argue things like "replayability" are subjective as well, but not nearly as much as whether you find a game's environment to be engrossing or not.

Very few games are considered universally engrossing. These are titles such as The Elder Scrolls / Fallout and the like.